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Question

The points A(4,7) B(p,3) and C(7,3) are the vertices of a right triangle, right -angled at B, Find of P.

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Solution

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A(4,7), B(p,3) & c (7,3) are vertices of right angle triangle then u
using Pythagoras theorem
(AC)2=(AB)2+(BC)2
(74)2+(37)2=(p4)2+(37)2+(p7)2+(33)2
9+16=(p4)2+16+(p7)2
9=p2+168p+p2+4914p
2p222p+56=0
p211p+28=0
p27p4p+28=0
(p-4)(p-7)=0
Hence p-4=0 & p-7=0
[p=4,7]

1194420_1373238_ans_75392471f56243cd9496b7575bdd5f4f.JPG

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